dlclose reports ENOENT with simple code

[Yuyi Wang via Cygwin]

Code to reproduce:

#include <dlfcn.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
    void* handle = dlopen("/usr/bin/cygwin1.dll", RTLD_LAZY | RTLD_LOCAL);
    if (!handle)
    {
        printf("dlopen: %s\n", dlerror());
        exit(1);
    }
    int res = dlclose(handle);
    if (res != 0)
    {
        printf("dlclose: %s\n", dlerror());
        exit(1);
    }
}


The program should succeed, but now it fails with "dlclose: No such file 
or directory".


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